Connection system for push joint valve and fittings

Abstract

A push joint adapter is connectable to one or more push joint pipe fittings in a pipeline. The push joint adapter includes an insertion section insertable into a socket of a push joint pipe fitting in an interference fit, a pipeline section connectable with the pipeline, and a collar disposed between the insertion section and the pipeline section. A restraint ring assembly cooperable with the push joint pipe fitting includes a restraint ring secured to the pipeline section and engaging the collar and a restraint rod connected to the restraint ring. The push joint adapter facilitates connecting push joint gasketed bell gate valves and fittings in a pipeline such as a polyethylene pipeline.

The invention claimed is: 
     
       1. An assembly for connecting an isolation valve in a polyethylene pipeline, the assembly comprising a first push joint adapter, a second push joint adapter, and the isolation valve, the isolation valve including a first valve socket and a second valve socket, the first push joint adapter comprising:
 a first insertion section insertable into the first valve socket of the isolation valve in an interference fit; 
 a first pipeline section connectable with the pipeline; 
 a first collar disposed between the first insertion section and the first pipeline section; and 
 a first restraint ring assembly including a first restraint ring positioned on the first pipeline section and engaging the first collar and a first restraint rod connected to the first restraint ring, 
 the second push joint adapter comprising: 
 a second insertion section insertable into the second valve socket of the isolation valve in an interference fit; 
 a second pipeline section connectable with the pipeline; 
 a second collar disposed between the second insertion section and the second pipeline section; and 
 a second restraint ring assembly including a second restraint ring positioned on the second pipeline section and engaging the second collar and a second restraint rod connected to the second restraint ring, 
 wherein the first restraint ring of the first push joint adapter is directly connected to the second restraint ring of the second push joint adapter by the first and second restraint rods, wherein the first and second restraint rods include bends therein around the isolation valve such that the first and second restraint rods are non-linear, and wherein the first and second restraint rods are threaded at ends thereof that receive a connector to secure the isolation valve in place. 
 
     
     
       2. In combination, a push joint adapter connected to a push joint pipe fitting in a pipeline, the combination comprising:
 the push joint pipe fitting including a first socket; 
 a pipe fitting collar associated with the push joint pipe fitting; 
 a pipe fitting restraint ring engaging the pipe fitting collar; and 
 the push joint adapter including:
 an insertion section inserted into the first socket of the push joint pipe fitting in an interference fit, 
 a pipeline section connectable with the pipeline, 
 an adapter collar disposed between the insertion section and the pipeline section, and 
 a restraint ring assembly coupled with the push joint pipe fitting and including an adapter restraint ring positioned on the pipeline section and engaging the adapter collar and a restraint rod connected to the adapter restraint ring at one end and to the pipe fitting restraint ring at an opposite end, 
 
 wherein the push joint pipe fitting comprises an isolation valve having the first socket and a second socket, the combination comprising two of the push joint adapters respectively secured in the first and second sockets of the isolation valve, wherein the restraint rod includes bends therein around the isolation valve such that the restraint rod is non-linear, and wherein the restraint rod is threaded at ends thereof that receive a connector to secure the isolation valve in place. 
 
     
     
       3. The combination according to  claim 2 , wherein the restraint ring assembly includes two restraint rods, and wherein the two restraint rods include bends around the isolation valve.